Vulnerabilities > CVE-2019-7612 - Information Exposure Through Log Files vulnerability in multiple products

047910
CVSS 9.8 - CRITICAL
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
HIGH
Integrity impact
HIGH
Availability impact
HIGH
network
low complexity
elastic
netapp
CWE-532
critical
nessus
NVD
Published: 2019-03-25
Updated: 2020-10-05

Summary

A sensitive data disclosure flaw was found in the way Logstash versions before 5.6.15 and 6.6.1 logs malformed URLs. If a malformed URL is specified as part of the Logstash configuration, the credentials for the URL could be inadvertently logged as part of the error message.

Vulnerable Configurations

Part Description Count
Application
Elastic
167
Application
Netapp
1

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Fuzzing and observing application log data/errors for application mapping
    An attacker sends random, malformed, or otherwise unexpected messages to a target application and observes the application's log or error messages returned. Fuzzing techniques involve sending random or malformed messages to a target and monitoring the target's response. The attacker does not initially know how a target will respond to individual messages but by attempting a large number of message variants they may find a variant that trigger's desired behavior. In this attack, the purpose of the fuzzing is to observe the application's log and error messages, although fuzzing a target can also sometimes cause the target to enter an unstable state, causing a crash. By observing logs and error messages, the attacker can learn details about the configuration of the target application and might be able to cause the target to disclose sensitive information.

Nessus

NASL familyCGI abuses
NASL idLOGSTASH_ESA_2019_05.NASL
descriptionA sensitive data disclosure flaw was found in the way Logstash logs malformed URLs. If a malformed URL is specified as part of the Logstash configuration, the credentials for the URL could be inadvertently logged as part of the error message.
last seen2020-06-01
modified2020-06-02
plugin id122977
published2019-03-20
reporterThis script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof.
sourcehttps://www.tenable.com/plugins/nessus/122977
titleLogstash ESA-2019-05
code
#
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(122977);
  script_version("1.2");
  script_cvs_date("Date: 2019/10/30 13:24:46");

  script_cve_id("CVE-2019-7612");

  script_name(english:"Logstash ESA-2019-05");
  script_summary(english:"Checks the version of Logstash.");

  script_set_attribute(attribute:"synopsis", value:
"The remote web server hosts a Java application that is vulnerable.");
  script_set_attribute(attribute:"description", value:
"A sensitive data disclosure flaw was found in the way Logstash logs
malformed URLs. If a malformed URL is specified as part of the
Logstash configuration, the credentials for the URL could be
inadvertently logged as part of the error message.");
  script_set_attribute(attribute:"see_also", value:"https://www.elastic.co/community/security");
  script_set_attribute(attribute:"solution", value:
"Users should upgrade to Logstash version 5.6.15 or 6.6.1");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-7612");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/02/19");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/02/19");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/03/20");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:elasticsearch:logstash");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"CGI abuses");

  script_copyright(english:"This script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("logstash_api_detect.nbin");
  script_require_keys("installed_sw/Logstash");
  script_require_ports("Services/www", 9600);

  exit(0);
}

include("audit.inc");
include("http.inc");
include("vcf.inc");

app = "Logstash";

get_install_count(app_name:app, exit_if_zero:TRUE);

port = get_http_port(default:9600);

app_info = vcf::get_app_info(app:app, port:port, webapp:TRUE);

constraints = [
  { "min_version" : "5.0.0", "fixed_version" : "5.6.15" },
  { "min_version" : "6.0.0", "fixed_version" : "6.6.1" }
];

vcf::check_version_and_report(app_info:app_info, constraints:constraints, severity:SECURITY_WARNING);

References